Improvement in apparatus for removing sediment from steam-boilers



- 2 Sheets-Sheet 1. T. 0 PURVES. Apparatus for RQ-mfoving Sediment fromSteam Boilers No. 201,446. Patented-March 19,1878.

WITNESSES Q INVENTOR 2 Sheets- Sheet 2.

T. C. P'URVES. Apparatus for Removing Sediment from Steam Boilers.

No. 201,446. l gatented March 19,1878.

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WITNEEEEE' INVENTOR MPETERS, PHOT0- L|YHOGRAPHER, WASHINGTON. D c.

Uni-TED "STAT-Es PATENT OFFICE.

THOMAS" C. PURVES, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN APPARATUS FOR REMOVING SEDIMENT FROM STEAM-BOILERS.

Specification forming part of Letters Patent No. 201,446, dated March19, 1878; application filed- December 27, 1877. i

'ment in that class of sediment-removers in which exterior pipes extendinto the boiler, and form a means whereby a continuous current of waterfrom a pipe or pipes in the boiler passes through the exterior pipe, andafter depositing the sediment in a trap passes in the boiler. Thisoperation is on the well-known principle that as the water is hottest atthe upper surface, and to that place the sediment is carried, the objectbeing to remove the sediment at the waters surface before it descendsand forms a scale by the cooling of the water.

The nature of the present invention consists in forming a connectionbetween the exit-pipe from the boiler and the return-pipe thereto with asediment-receiver whose under side is formed with two inclined plates ofsuch downward pitch as to form a considerable enlargementfor thereception of deposit without contracting the interior water-current, theends of the receiver communicating with the exit and return pipes beingabout the size of said pipes, whereby there are no eddies in the currentof water either in entering the receiver or passing out of it. Thedeepest part of the receiver communicates with the lower receiver, whichis inverted in form, by means of a suitable pipe and stop-cock, saidlower receiver being tapped at one or both ends for the discharge of itscontents. By this construction there are no sharp angles or deeprecesses where sediment can lodge to form a crust and render the deviceinoperative, as is the case where square-box traps are used.

In the drawings, Figure 1, Sheet 1, is an elevation of an apparatus forremoving sediment from a boiler and embodying my improvement. A brokenelevation of a boiler shows the relation of the apparatus thereto.

tion of boiler not arched or cased in. B B are curved pipes, providedwith a series of perforations or holes, 0 G O, that both steam and watermayhave access to one or more openings in the pipes, that watercontaining sediment may pass in at the steam-surface. These pipes B Bcommunicate with a transverse pipe, D, which by means of an ordinarycoupling, E, communicates With-a parallel pipe, I*. The latter pipepasses through the boiler A, and connects with the exterior pipe G,which connects with the trap H, and by means of a continuous pipe, I II, attached to the opposite end of the trap H, and to the boiler A, arethe means, together with action of steam and water in the boiler, forcausing a current of water to pass continuously through the trap H.

Placed centrally and vertically in the trap is a deflecting-plate, S,which serves the purpose of directing sediment to the bottom of thetrap.

J represents a stud for securing the internal pipes to the boiler. Krepresents a receivingchamber, which is placed below the trap H, andcommunicates with it by means of a discharge-pipe, L, in which is tappeda cock, M, which may be turned so as to close communication with thechamber K, or turned so as to draw off the contents of the trap Hwithout waste of steam.

Other cocks are employed, as follows: A cock, N, to shut off thecommunication of the trap H with the boiler A; a cock, 0, to stop thecurrent of water after it is in the trap H; and a cock, I, to draw offthe contents of the chamber K.

B represents supports, which, when secured to the outside of the boilerA, will sustain properly the exterior part of the apparatus.

To attach the apparatus to a boiler, arched or bricked in, the exteriorpipes are to be of such length as to bring the trap outside of the brickcasin g, from which it may secure its support, or from the floor.

To put the apparatus in operation, open the cooks N O M to pass acurrent of water through trap H.

To draw off the sediment from chamber K, close cock M and open cock P.

To readjust the apparatus, open cock M and close cock P, and, thecurrent of water continuing, sediment will fall through trap H intochamber K. From this it will be seen that the discharging of sedimentfrom chamber K does not intercept the current of water through the trapH, and that the water is taken out of the boiler at a point above allofthe apparatus, thereby having the advantage of the gravity of thesediment.

I have described and shown the mechanism to a complete Working device,but the following claim will limit the novelty of my invention.

What I claim, and desire to secure by LettersPatent, is

The receiver H, having small ends communicating with the exit and inletpipes to the boiler, and a double inclined bottom, which, at its lowerextremity, by means of pipe L, connects with the highest part of thereceiver K, the said receiver being provided with cocks, as and for thepurpose set forth.

THOMAS C. PURVES.

Witnesses:

A. G. MOREY, G. L. OHAPIN.

